<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 视图区 -->
        <el-card>
            <el-row>
                <el-button type="primary" @click="showAddDialogVisible">添加分类</el-button>
            </el-row>
            <tree-table :data="cateList" :columns="columns" border :selection-type="false" :expand-type="false" show-index>
                <!-- 是否有序 -->
                <template slot="isok" slot-scope="scope">
                   <i class="el-icon-success" v-if="scope.row.cat_deleted===false"></i>
                   <i class="el-icon-error" v-else></i>
                </template>
                <!-- 排序 -->
                <template slot="order" slot-scope="scope">
                    <el-tag type="danger" v-if="scope.row.cat_level===0">等级一</el-tag>
                    <el-tag type="success" v-else-if="scope.row.cat_level===1">等级二</el-tag>
                    <el-tag v-else>等级三</el-tag>
                </template>
                <!-- 操作 -->
                <template slot="opt" slot-scope="scope">
                    <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                </template>
            </tree-table>
            <!-- 分页 -->
            <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="queryInfo.pagenum"
                :page-sizes="[1, 3, 5, 7]" :page-size="queryInfo.pagesize" layout="total, sizes, prev, pager, next, jumper" :total="total">
            </el-pagination>
        </el-card>
        <!-- 添加分类的对话框 -->
        <el-dialog title="添加分类" :visible.sync="addDialogVisible" width="50%" @close="addDialogClose">
            <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
                <el-form-item label="分类名称:" prop="cat_name">
                    <el-input v-model="addCateForm.cat_name"></el-input>
                </el-form-item>
                <el-form-item label="父级分类:">
                    <el-cascader v-model="cateChooseId" expandTrigger="hover" :options="parentCateList" :props="catePorps"
                        @change="cateChooseChange" :clearable="true"></el-cascader>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addCate">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data() {
        return {
            queryInfo:{
                type:3,
                pagenum:1,
                pagesize:7
            },
            // 商品分类的数组列表
            cateList:[],
            total:0,
            columns: [{
                label: '分类名称',
                prop: 'cat_name'
            },
            {
                label: '是否有效',
                type: 'template',
                template: 'isok'
            },
            {
                label: '排序',
                type: 'template',
                template: 'order'
            },
            {
                label: '操作',
                type: 'template',
                template: 'opt'
            }
            ],
            // 对话框是否展开
            addDialogVisible:false,
            addCateForm:{
                cat_name:'',
                // 父级分类Id
                cat_pid:0,
                // 分类等级，默认一级分类
                cat_level:0
            },
            // 分类的验证规则
            addCateFormRules:{
                cat_name:[
                    {required:true,message:'请输入分类',trigger:'blur'}
                ]
            },
            parentCateList:[],
            catePorps:{
                value:'cat_id',
                label:'cat_name',
                children:'children',
                checkStrictly:true
            },
            cateChooseId:[]
        };
    },
    created(){
        this.getCateList()
    },
    mounted() {
        
    },

    methods: {
        async getCateList(){
            const {data:res} = await this.$http.get('categories',{params:this.queryInfo})
            this.cateList = res.data.result
            // 为总数据条数赋值
            this.total = res.data.total
        },
        handleSizeChange(newSize){
            this.queryInfo.pagesize = newSize
            this.getCateList()
        },
        handleCurrentChange(newPage){
            this.queryInfo.pagenum = newPage
            this.getCateList()
        },
        showAddDialogVisible(){
            this.getParentCateList()
            this.addDialogVisible = true
        },
        // 获取父级分类
        async getParentCateList(){
          const {data:res} = await this.$http.get('categories',{params:{type:2}})
          this.parentCateList = res.data
        },
        // 选择器发生变化
        cateChooseChange(){
            if (this.cateChooseId.length>0) {
                
              this.addCateForm.cat_pid = this.cateChooseId[this.cateChooseId.length-1]
              this.addCateForm.cat_level = this.cateChooseId.length
              return
            }else{
                  
              this.addCateForm.cat_pid = 0
              this.addCateForm.cat_level = 0
            }
        },
        addCate(){
            this.$refs.addCateFormRef.validate(async valid=>{
                if (!valid) return
                const {data:res} = await this.$http.post('categories',this.addCateForm)
                this.$message.success(res.meta.msg)
                this.getCateList()
                this.addDialogVisible = false
            })
        },
        addDialogClose(){
            this.$refs.addCateFormRef.resetFields()
            this.cateChooseId=[]
            this.addCateForm.cat_level=0,
            this.addCateForm.cat_pid = 0
        }
        
    },
};
</script>

<style lang="less" scoped>

</style>